Abstract
An artificial, targeted, light-activated nanoscissor (ATLANS) was developed for precision photonic cleavage of DNA at selectable target sequences. The ATLANS is comprised of nanoparticle core and a monolayer of hydrazone-modified triplex-forming oligonucleotides (TFOs), which recognize and capture the targeted DNA duplex. Upon photo-illumination (λ = 460 nm), the attached hydrazone scissor specifically cleaves the targeted DNA at a pre-designed nucleotide pair. Electrophoretic mobility shift and co-precipitation assays revealed sequence-specific binding with the short-fragment and long-form plasmid DNA of both TFO and TFO-nanoparticle probes. Upon photo-illumination, ATLANS introduced a precise double-stranded break 12. bp downstream the TFO binding sequence and down-regulated the target gene in HeLa cell system. Gold nanoparticles multiplexed the cutting efficiency and potential for simultaneous manipulation of multiple targets, as well as protected DNA from non-specific photo-damage. This photon-mediated DNA manipulation technology will facilitate high spatial and temporal precision in simultaneous silencing at the genome level, and advanced simultaneous manipulation of multiple targeted genes.
Original language | English |
---|---|
Pages (from-to) | 6545-6554 |
Number of pages | 10 |
Journal | Biomaterials |
Volume | 31 |
Issue number | 25 |
DOIs | |
Publication status | Published - 2010 Sept |
All Science Journal Classification (ASJC) codes
- Bioengineering
- Ceramics and Composites
- Biophysics
- Biomaterials
- Mechanics of Materials